Hedvig and Henry need to get rid of their stepmother and with the help of their grandmother their hire Carl, an out of work janitor.

　　在一个暑假，四个小伙伴脱离了父母的监管，并发现他们都有隐藏的能力。当这些天真无邪的孩子在附近的森林里使用这些新能力时，不知不觉吸引了黑暗的东西，奇怪的事情开始发生。